165622020 has 48 divisors (see below), whose sum is σ = 465174528. Its totient is φ = 44029440.

The previous prime is 165622013. The next prime is 165622063. The reversal of 165622020 is 20226561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16125 + ... + 24315.

It is an arithmetic number, because the mean of its divisors is an integer number (9691136).

Almost surely, 2^165622020 is an apocalyptic number.

165622020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165622020 is an abundant number, since it is smaller than the sum of its proper divisors (299552508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165622020 is a wasteful number, since it uses less digits than its factorization.

165622020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8540 (or 8538 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 165622020 is about 12869.4218984382. The cubic root of 165622020 is about 549.1690150849.

Adding to 165622020 its reverse (20226561), we get a palindrome (185848581).

The spelling of 165622020 in words is "one hundred sixty-five million, six hundred twenty-two thousand, twenty".